line chart

9 posts
Choosing the right metric reveals the story behind the subway mess in NYC

I forgot who sent this chart to me - it may have been a Twitter follower. The person complained that the following chart exaggerated how much trouble the New York mass transit system (MTA) has been facing in 2017, because of the choice of the vertical axis limits. This chart is vintage Excel, using Excel defaults. I find this style ugly and uninviting. But the chart does contain some good...

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Let’s not mix these polarized voters as the medians run away from one another

Long-time follower Daniel L. sent in a gem, by the Washington Post. This is a multi-part story about the polarization of American voters, nicely laid out, with superior analyses and some interesting graphics. Click here to see the entire article. Today's post focuses on the first graphic. This one: The key messages are written out on the 2017 charts: namely, 95% of Republicans are more conservative than the median Democrat,...

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Let’s not mix these polarized voters as the medians run away from one another

Long-time follower Daniel L. sent in a gem, by the Washington Post. This is a multi-part story about the polarization of American voters, nicely laid out, with superior analyses and some interesting graphics. Click here to see the entire article. Today's post focuses on the first graphic. This one: The key messages are written out on the 2017 charts: namely, 95% of Republicans are more conservative than the median Democrat,...

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Storm story, a masterpiece

The visual story published by the New York Times on hurricane Irma is a masterpiece. See the presentation here. The story starts with the standard presentation of the trajectories of past hurricane on a map: Maps are great at conveying location and direction but much is lost in this rendering - wind speeds, time, strength, energy, to name but a few. The Times then switches to other chart forms to...

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Making people jump over hoops

Take a look at the following chart, and guess what message the designer wants to convey: This chart accompanied an article in the Wall Street Journal about Wells Fargo losing brokers due to the fake account scandal, and using bonuses to lure them back. Like you, my first response to the chart was that little has changed from 2015 to 2017. It is a bit mysterious the intention of the...

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Shocker: ease of use requires expanding, not restricting, choices

Recently, I noted how we have to learn to hate defaults in data visualization software. I was reminded again of this point when reviewing this submission from long-time reader & contributor Chris P. The chart is included in this Medium article, which credits Mott Capital Management as the source. Look at the axis labels on the right side. They have the hallmarks of software defaults. The software designer decided that...

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Confuse, confuses, confused, confusing

Via Twitter, @Stoltzmaniac sent me this chart, from the Economist (link to article): There is simply too much going on on the right side of the chart. The designer seems not to be able to decide which metric is more important, the cumulative growth rate of vehicles in use from 2005 to 2014, or the vehicles per 1,000 people in 2014. So both set of numbers are placed on the...

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Charting NICAR Attendance, Over the Years

Next week is the Investigative Reporters and Editors annual CAR convention — the gathering of news nerds from across the world to discuss the latest and greatest in data journalism. This year NICAR, as its known among the nerds, is in Jacksonville, Fla. After attending each year since 2006, I had to skip the convention in 2015 and 2016 because I now live in Seoul. But I’m making the long journey...

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Layered donuts have excess fats and oils

Via Twitter, Nicholas S. sent this chart: It's a layered donut. There isn't much context here except that the chart comes from USDA. Judging from the design, I surmise that the key message is the change in proportion by food groups between 1970 and 2014. I am assuming that these food groups are exhaustive so that it makes sense to put them in a donut chart, with all pieces adding...

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Is this chart rotten?

Some students pointed me to a FiveThirtyEight article about Rotten Tomatoes scores that contain the following chart: (link to original) This is a chart that makes my head spin. Too much is going on, and all the variables in the plot are tangled with each other. Even after looking at it for a while, I still don't understand how the author looked at the above and drew this conclusion: "Movies...

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